Doug
When we purchased our court yard villa I mentioned to the realtor that the rear downspouts drains go underground and asked where do they go. I also asked if there was drainage line for the backyard since it was walled in and runoff had no discharge path. He didn't know. After the purchase I looked at each downspout and the angle the underground lines were headed. I estimated the junction point and dug a hole. About 1 foot below the top of the mulch I found a drain box that went to the a main drain. The previous owners cover the drain for years with mulch, so the surface water wouldn't run off and only seep into the ground. I purchase an extension for the drain box and everything was find. That is also where the downspouts discharged to.
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